Heat-economizer



D. S. iACUBUS.

HEAT EGONOMZER.

APPUCAHON min NOV. 20. 19:8.

1 ,329,767. Patented Feb. 3-, 1920 M yENTOR.

- f/ ua Wanna UNITED TES PATENT OFFICE DAVID S. JACOBUS, OF JEItE-Y CITY, NEW JERSEY, ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

HEAT-ECONOMIZEB- Specification of Lean- 1 Patent.

Patented Feb. 3, 1920.

Original application filed December 8, 1914, Serial No. 876,011. Divided and this application filed. November To all whom it may concern Be it known that 1, DAVID S. Jnconns, a. -itizen of the United States, residing in Jersey City, in the county oflludson and State of New Jersey, have invented certain new and useful huprm'oinents in Heat- Economizers, of which the following is a spmiification. 1

My invention relates to gm. eoonoinizer and more particularly to a high pressure economizer of the form shown in my prior rip-- plication, Ser. No. 876,011, which was filed in the Patent ()ltice. Dec. 8. 1914, of which the present application is a division, said prior application having become- U. '5. Let ters Patent No. 1,289,182, which was issued December 31, 1918.

My present invention relates more pan ticularly to the QUUHOIILAPI construction in which boxes or headers are arranged in rows 7 within'the cconomizer flue and connected by rows of economizel" tubes inclined to the horizontal and secured .in the headers, the latter being spaced apart sufficiently to permit of the ends of the tubes being placed therebetween in order to insert the sanie in the headers or remote, the same therefrom.

ln accordance with my invention the gases are made to travel in a downward direction over the. tubes of the econoinizer, and the flow of water through said tubes is in general in the reverse direction of the flow of the gases.

My invention will best be understood by reference to the accompanying drawings, in which Figure l is a rear \'i w of an econouiizer embodying my invehti ii, and Fig. 2 a detailed view showing tlte ent colmeetion between the boxes of Figplw The econoniizer embodying my invention and which will usually be of the high pressure type, is shown as consisting of a series of rows of. tubes 25 expanded into horizontal boxes or headers 20, and as having a slight inclination upward in the direction of flow of the water. The tubes and boxes are preferably of wrought iron or Wrought steel to Withstand the high boiler pressure to which this stage of the ,eeonm mizer is subjected. The inlet pipe 22 enters the lowermost of the headers 26, as shown in Fig. 1, and by said header is distrilinited Serial No. 263,305.

to the tubes of the lowermost row. The water then flows through the successive rows of tubes, from side to side, as indicated by the arrows, until it lco ies through pipe 737 by which it is dclirciwl to the. steam and water drum The described liow of the water thr ugh the high pressure, stage of the cconomizer provides for a positive circula tion, and the passage through tubes all of which are inclined upward with reference to the direction of flow of the Water. Thiscauses any a l! or iioineondensable gases which may not have been removed from the water in the gas liberating tank through which the water passes before reaching the cconoiuizer to be carried along with the general current and out of the economizer. It also allows of a construction which can be readily relieved of air on. being filled with water from an empty state. The positive circulation of Water through the high pressure stage is also of great advantage in causing a maximum amount of heat absorption from the gases.

The horizontal boxes or headers 26 of each row are spaced apart so that the tubes may be replaced by mssing them between two of the boxes and into the hole in the box on the opposite side of the economizer. The tube is slipped in some distance through the box on the opposite side, then brou ht opposite the hole in the other box to which it is to be connected, and then drawn back to the proper position. Another advantage of the construction is that the hand-hole fittings opposite the tube ends for use in expanding the tubes may be made smaller than where the tubes are passed through the hand-hole fittings. thus making it possible to construct a stronger box from the same thickness of material. Again, a sin gle handhole fitting may be employed for expanding two or more of the tubes, the expander being introduced through such hand-hole fittin as are desired for assisting in the mnniplllation of the jointed ex )ander and for in spec-ting the tube ends. leplaeing the tubes in the way described is advantageous also in making it possible to set the boilers and economizers nearer together. that is. with less aisle room, than where the tube are. replaced through the hand'hole tittmgs. Should the tubes be replaced through the ordinary form of hand-hole littin s, the aisle width would have to be such t rat the full length of a tube could be introduced at right-angles to the boxes. whereas with the arrun ment described the tubes may be mov sidewise between the boxes and introduced at an angle.

Still another advantage of this arrange ment relates to cleaning the tubes. Owing to the boxes being spaced apart from each other in the rows and a space being in the separating bricks or material which may be used between the boxes, a steam or air lance may be inserted between the boxes either through special openings or through the doors 27' shown on Fig. 1. Such steam or air lance will serve to blow otf the soot and collection on the economizmtubes.

In Fig. 2 I have shown, on an enlarged scale, the manner of connecting the boxes 2(ito prevent the pocketing of air in the upper part of the'boxes and to permit its escape to the uppermost box. As there shown,

the connection consists of a relatively small vent pipe 26 extending from the top of one box to near the top of the boxdirect y above it. As so arranged the hit or gases must flow all the way along each one of the boxes before it can enter the vent pipe connection leading to the box directly above it,-thus preventing short circuiting' of the water Without the removal ofthe air, and causing air from the lowermost boxes to sweep through the full length of all of the upper boxes, which leads to therenroval of any air bubbles which might otherwise lodge at'certain points in the upper sides of e, boxes. Naturally, some of the air will/pass through the economizer tubes through he'i g carried along with the general currcnt f Water as previously described, the action oft e sinall vent pipe 26' being supplemental to this. In Fig. 2 I have also indicated handdiolc fittings 26 in the sides of the boxes for eX- pending the tube ends to make a tight joint. Each hand-hole fitting serves for the expansion ,of three tube ends, a jointed expander being used. I have also shown hand-hole fittings 26 in the ends of the boxes through which a jointed expander may be introduced for expanding the tubes.

The described economizer is especially appliceble to conditions where steam may a generated in the economizer. This feature will be useful in connection with waste heat work. where the ratio of the o k done in the low temperature gases.

the economizer and the boiler varies a'considerably greater amount than in coal fired boiler furnaces. lo a waste heat boiler the initial temperature of the gust-slutty for a time be over :JUUU l. The temperature of the gases may then fall to. say. approxi malely lUUU l.. with the same. or even a. greater. weight of gas flowing through the boiler per hour as existed with the higher tem a-rature. When a large volume of gas llovvs through the boiler and eronomizer at a low temperature. the relative amount of work done by the eronomizer. in proportion to that done by the boiler, is such that. it the economizrr is designed to give the best results with the high temperature gases,

steam will be formed in the economizer with With the ar rangrmrnt shown of the high pressure stage of the eronomizvr. any steam formed therein will not have as great a tenth-my to carry over slugs of water as in some other forms of economizers.

What I claim and desire to secure by Let tels Patent 01' the United States is:

1. Au economizer having oppositely located headers arranged in rows, tubes connecting said headers so as to present an unobstrncted passage for'the gases. the headers of each row being spaced apart sufficiently to allow the tubes to be passed between the headers for insertion, each header having a series of hand-holes and each hand-hole serving a plurality of tube holes.

2. An economizer having oppositely located headers arranged in rows, tubes connecting said headers so as to present an unobstructed passage for the gases. the headers of each row being spaced apart. the spaces betwem the headers and the interior cconomizer structure being arranged to allow the tubes to be passed in bet ween the headers and intrdduced in place into the tube holes.

3. An oco'nomizer comprising a fine for the passage of gases, headers arranged in rows within said line and at opposite. sides thereof, tubes connecting said headers so as to present an unobstructed passage. for the gases. the heai'lers of each row being spaced apart the spaces between the headers and the interior economizer structure being arranged to allow the tubes to be passed in between the headers and introduced in place into the tube holes.

4. An economizer having substantially horizontal headers arranged one above the other through which the water is successively circulated, smal vent connections extending from the top of'one header to the header directly above it.

5. An economize! having oppositely located headers arranged in rows, tubes connecting said headers so as to present an unobstructed passage for the'gases, vent con and having relatively ncctions leading from near 111(- tnp of mm In tvstinmny \vhvronf I have hereunto header to the 130K Ju'efl'ly uimw szmi fil'h i sagg'nml my name in Hm presence of two subheader, sand vent mnnm-t'mm hum s0 :1:' KPJ'IFHIIQ \VitIHSSUh.

ranged that thv ail um? gnaw HUNT Him I! DA VID S. JACOBUS. the way along (em-h mm 01' Hw lu'mfvl's Em Witnesses; fore it (an enter the "011i crmnwtiun Evading JOHN A. \V. DIXON,

to the box which comes dirvrtly ullmu it. 0. T. FOUCIIE. 

